Platen-press brake.



W. B. HAMILTON & G. T. NYHAGEN.

PLATEN PRESSBRAKE. APPLICATION FILED MAY 4, 190a.

Patented Jan. 5, 1915.

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JQ/yIm/Z JTQ, win/Lion W. H. HAMILTON & G. T. NYHAGEN PLATE-N PRESSBRAKE.

APPLIGATION FILED MAY 4, 1908.

1,123,27 9. Patented Jan. 5, 1915.

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6%? 6 %0%u" J4 M THE NORRIS PETERS CO. PHOTO-LITHO., WASHINGTON, D, c

UNITED STATJES PATENT OFFICE.

WILLIAM EDWIN HAMILTON AND GEORGE T. NYI-IAGEN, OF ST. PAUL, MINNESOTA;ASSIGNMENTS, T0 EDWARD W. BUDKE, OF

PLATEN-PRESS BRAKE.

Specification of Letters Patent.

Patented J an. 5, 1915.

Application filed May 4, 1908. Serial No. 430,777.

To all whom it may concern:

Be it known that we, WILLIAM EDWIN HAMILTON and GEORGE T. NYHAGEN, bothcitizens of the United States, and residents of St. Paul, in the countyof Ramsey and State of Minnesota, have invented certain new and usefulImprovements in Platen- Press Brakes, of which the following is aspecification.

Our invention relates to improvements in brakes for platen printingpresses, its 0bject being to provide a new and simple construction ofbrake actuatable from the throw off lever of the press.

To this end the invention consists in the features of construction andarrangement of parts hereinafter particularly described and claimed.

In the accompanying drawings forming part of this specification, Figure1 is a perspective view of our invention and adjacent parts; Fig. 2 isan enlarged view of the same in braking position partly broken away, andFig. 3 is a side elevation partly in section.

Referring to the drawings A represents the fly wheel of the ordinaryChandler & Price platen printing press shown connected with a suitablemotor 2 by a belt 3. B represents ordinary throw off lever of this typeof platen printing press, the lever being used to throw the impressionon or off. As shown the lever has suitable fulcrum support 4.

C represents a brake shoe shaped to conform to the periphery of the flywheel. The brake shoe is supported upon the standard 5 by a verticalbolt 6 carrying a bottom checknut 7 and a top check nut 8, these checknuts in conjunction with the bolt holding the shoe and allowing it to bevertically adjusted on the stand. The brake stand 5 has rocker feet 9which rest upon the floor and is secured thereto by lag screws 10secured in the floor and extending through enlarged openings 11 in therear ends of the rocker feet, a coil spring 12 being interposed betweenthe head of the lag screw and said feet. This coil spring will thus holdthe brake stand and brake in normal position, and the play between thelag screws and rocker feet will allow for swinging of the five centbrake stand to carry the brake into and out of braking position.

Carried by one side of the brake stand is a vertical standard 13 to thetop of which is connected one end of a rod 14, the opposite end of therod being slidable through a sleeve 15 having suitable pivotal support16 upon the lower end of the throw off lever B. A check nut 17 isthreaded upon the outer end of the rod 14: to regulate the throw of thebrake. The check nut 17 is so positioned with reference to the sleevethat the ordinary throw of the throw off lever in connection with theimpression will not exert pressure against the nut 17 and consequentlywill not throw on the brake. If it is desired to throw on the brake thethrow off lever is carried an additional distance forward to bring thesleeve against the nut 17 and by pressing thereon to draw forwardly therod 1 1 and rock the stand forwardly to carry the shoe into brakingposition against the fly wheel. The throw ofl lever 11 has nothing to dowith throwing ofl the power, but simply throws on or off the impression,and the brake mechanism does not interfere with the ordinary action ofthe lever. As stated it is merely necessary in order to apply the braketo give an additional throw to the throw off lever.

e claim as our invention:

In combination with the fly wheel and pressure throw off lever of amachine of the class described, a stand, a rocker supporting the lowerend of said stand, a brake shoe carried by said stand and in cooperationwith the fly wheel, a lever connection between the upper end of saidstand and said throw off lever, said lever mechanism having yieldingconnection with said throw ofl lever, and a bearing spring upon one sideof said rocker whereby to hold said lever mechanism in a positionnormally allowing play between said lever mechanism and throw off lever.

WILLIAM EDWIN HAMILTON. GEORGE T. NYHAGEN.

Witnesses:

PETER MANDRO, O. B. SCHMIDT.

5 each, by addressing the Commissioner of Patents,

Washington, D. 0.

